Attnrn



No. 607,793. Patented luiy l9, I898.

J. T. & T. R. BRIEN.

HOT AIR FURNACE.

(Application filed Sept. 13, 1897.)

(No Model.) 5 Sheets-Sheet L J. T. &. T. R. BRIEN. HOT AIR FURNACE.

(Application filed Sept. 13, 1897.)

(No Model.)

5 Sheets-8heet 2.

ATTURNEYl Pat ented July 19, I898.

Patented ,luly l9, I898.

J. T. & T. R. BRIEN.

HOT AIR FURNACE.

(Application filed Sept. 13, 1897.)

5 Sheets$heet 3.

(No Model.)

INVENTUR5= X WITNEEEEE= THE NORRIS versus :0, moroumo. wAsHmcTcN. p, c.

& 9 B I I. d e n 8 a P NE RC A N n U .F R &A .T TO H J l 9 '1 7 0 6 0 N (Application filed Sept. 13, 1897.) (No Model.) 5 Sheets-8heet 4.

WITNESSES INVENTSSS= 6W 0%. 0 mm 2am I /7 zj hnw wo 'w ATTEIRNEY s PETERS con PKGYQLUTMIQQWASHINGYDN a c No. 607,793. Patented July I9, 1893. J. T. &. T. R. BRIEN.

HOT AIR FURNACE.

{Application filed Sept. 13. 1897.) 1 (No Model.) 5 Sheets$heet 5.

INVENTURE WITNESSES a I m 1 7 MWZ I? 6M ;5. zkvevzw z wwm @94 I ATTDRNEY Nrrn STATES ATENT FFIQE.

JAMES T. BRIEN AND THEODORE R. BRIEN, OF I-IOOSICK FALLS, NElV YORK, ASSIGNORS OF ONE-HALF TO HENRY WV. STONE, OF SAME PLACE.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 607,793, dated July 19, 1898. Application filed September 13, 1897. Serial No. 651,470. (No model.)

To all whom it may concern: a single iron casting having a cylindrically- Be it known that we, JAMES T. BRIEN and arched top, a flat bottom, and partitions M THEODORE R. BRIEN, citizens of the United M and N, extendingapproximately from front States, residing at Hoosick Falls, county of to rear of the box to form flues extending 55 Rensselaer, and State of New York, have infrom front to rear parallel with the lower vented certain new and useful Improvements flues f f. The flue-boxand fire-pot sections in Hot-Air Furnaces, of which the following are nested together by means of interengagis a specification. ing flanges, as shown in Fig. 5, the flange on This invention consists of the novel conthe bottom of the flue-boxsurroundinga bot- 6o 10 struction and combination of parts hereinaftom aperture therein which communicates t-er described and subsequently claimed. with the interior of the fire-pot and forms a Reference maybe had to the accompanying passage-way for the gases of combustion to drawings, and the letters of reference marked escape from the fire-pot into the flue-box. I thereon, which form a part of this speciflca- The flue'box is considerably Wider than the I 5 tion. fire-pot and overhangs the same along the Similar letters refer to similar parts in the sides, the overhanging portions being proseveral figures. vided with apertures adapted to communi- Figure l of the drawings is a view in 'percate with the upper ends of the vertical fluespective of our improved furnace, showing pipes b and b, which communicate at their 20 the upperflue-box and fire-pot sections partly lower ends With the lower base-flues f f.

removed through the front aperture in the The side portions of the casing are verticasing. Fig. 2 is aviewin perspective showcal, and the top of the casing is cylindrically ing the rear end of the furnace, the casing arched and parallel with the top of the upper being removed and parts broken away for flue-box. The front of the casing is provided 25 convenience of illustration. Fig. Sis a view with an aperture approximately the size of of the front locking-plate. Fig. aisa central the cross-section of the upper flue-box and vertical longitudinal section of the furnace. fire-pot sections, and the lower fire-pot sec- Fig. 5 is a central vertical transverse section tion is. permitted to rest loosely upon the of the same. Fig. 6 is a view in perspective base-casting, whereby the flue-box and fire- 0 of the removable upper flue-box inverted. pot sections can be drawn out through the Fig. '7 is aview similar to Fig. 1, showing the front aperture in the casing when it is defurnace complete and ready for use. Fig. 8 sired to have access to the interior of the is a view in perspective of a clamping split furnace for cleaning or repairs. The fluering for supporting a vertical flue-pipe. box is provided on its front end with a 3 5 The object of our invention is to produce flanged head adapted to close the upper part a hot-air furnace of simple construction and of the front opening in the casing when the of maximum capacity in proportion to size flue-box is fully inserted. The lower part of and one that can be easily and quickly cleaned such opening is closed by the locking-plate C, and repaired. which has a flange on its upper edge adapted 0 Referring to the drawings, S represents the to overlap and engage the lower edge of the ash-pit, P the grate, R R the fire-box, and A flanged head K of the flue-box. The parts the outer casing, of the furnace. are locked in position by the buttons 25, as The ash-pit is formed of iron castings in shown in Fig. 7. By means ofv this formof connection with the flues f f in the base of construction we are able to remove the flue- 5 the furnace, said flues extending horizontally box and fire-pot and have access to the infrom front to rear of the furnace on opposite terior of the furnace with the greatest facility sides of the ash-pit. The fire-pot is also and without interfering with the grate or base formed of iron castings in sections resting portions of the furnace. one upon the other, the lower section resting The head of the flue-box is provided with I00 50 upon the base-casting. an aperture closed by door D for the intro- L is the upper flue-box, which is formed of duction of fuel into the fire-pot. The door D is provided with a damper or valve E for admitting cold air when desired. The head of the flue-box is also provided with small hand-holes closed by doors or valves I, whereby access may be had to the interior of the upper fines.

The gaseous products produced by the combustion of fuel in the fire-pot pass upwardly from the fire-pot into the upper-flue box, where they are divided by the central partition or flue-plate N, the divided cur-' rents of gas passing around the rear ends of the partitions or flue -plates M M, thence downwardly through the vertical flue-pipes into the base-fines f f. The gases, having thus passed over an extended area of metal in the various fines, are largely deprived of their heat and are permitted to escape from the base-fines into a smoke-pipe at the rear of the furnace, which leads to a chimney in the usual manner.

The rear end of the upper-flue box is pro.- vided with an aperture 0, which communicates with an upper branch of the smokepipe when the flue-box is inserted within the casing. This upper branch of the smokepipe is controlled by a valve or damper r, Fig. 2, which whenopen permits the gases to pass directly into the smoke-pipe from the flue-box without passing through the vertical flue-pipes or the base-fines. When the valve r is closed, the gaseous currents-are caused to pass through all the flues on their way to the smoke-pipe. The flue-surfaces thus become highly heated, and the air inclosed be-' tween the casing and the lire-pot and fines is raised to a high temperature by contact with the heated surfaces and rises through the distributing-pipes a, whence it may be conducted to desired points.

The distributing-pipes a connect with the top of the casin g and may be as many in number as desired within the capacity of the furnace. Air at a comparatively low temperature is supplied to the interior of the casing through the inlets h, which extend along the bottom of the sides of the 'casing. A short distance above the inlets h we provide defiectors XV, arranged obliquely within-the casing and coni-erging at the top toward the firepot, whereby the entering currents of air are directed against the fire-pot and under the overhanging sides of the upperfiue-box, causing them to traverse an irregular path and bringing practically all of the air into contact with the most highly-heated parts of the apparatus.

hen desired, the casing may comprise an inner wall B in connection with the outer wall A, the two walls being separated by an inclosed air-space d, the inner wall B being provided with inlet-apertures K at the bottom and outlet-apertures K at the top to per mit circulation of air in the inclosed air-space d. The inclosed air-space d prevents loss of heat from the furnace by acting as a nonconducting shield. The vertical flue-pipes are supported at their lower ends by clamping split rings '12, which prevent the disarrangement of said pipes by the withdrawal or insertion of the upper flue-box.

F F are doors closing apertures leading into the base-fines, which have the function of cold-air drafts and also permit access to the interior of the base-fines when it is desired to clean the same.

What we claim as new, and desire to secure by Letters Patent, is

1. In a hot-air furnace, the combination with abase and lower horizontal fines extending from front to rear on opposite sides of the ash-pit in the base, and a casing mounted upon the base and provided with a front aperture; a fire-pot and vertical fines connecting at the lower end with the base-fines; of an upper flue-boX located within the casing and removable through the front aperture therein and having flues extending from front to rear and provided with bottom apertures com mu nicating respectively with the fire-pot and the upper ends of the several vertical flues, substantially as described.

2. In a hot-air furnace, .the combination with a fire-pot; a base provided with horizontal flues; vertical flue-pipes communicating at their lower ends with the base-fines; an inclosing casing having a front aperture; a smoke-pipe at' the rear of the casing having an upper branch, and a lower branch communicating with the base-fiues; and a damper in the upper branch of the smoke-pipe; of an upper flue-box removably inserted in thefront aperture in the casin g and provided with fluepartitions, an aperture in the rear end and apertures in the bottom communicating respectively with the upper branch of the sun okepipe, and the fire-pot and upper ends of the vertical flue-pipes, when the flue-box is inserted within the casing, substantially as de-' scribed.

JAMES T. BRIEN. THEODORE R. BRIEN:

\Vitnesses:

EDWARD L. VILDER, LAWRENCE E. BUCKLEY. 

